Estimate a theoretical line-of-sight radio coverage radius for a iot network link using a link budget and the free-space path-loss equation. The result includes radius in kilometers and miles, ideal circular area, and allowable path loss for an early feasibility check.
The main result is a deterministic estimate based on the entered assumptions. Supporting values make the margin, demand, or conversion visible so you can compare scenarios without treating the output as a guarantee.
Free-space path loss is an upper-bound planning model. Buildings, terrain, foliage, antenna height, interference, duty-cycle rules, and link technology can reduce real coverage substantially.
At 20 dBm transmit power, 2 dBi antennas, −100 dBm sensitivity, 15 dB margin, and 915 MHz, the free-space radius is about 7.35 km.
Free-space path loss is an upper-bound planning model. Buildings, terrain, foliage, antenna height, interference, duty-cycle rules, and link technology can reduce real coverage substantially.
Use a measured value from the busiest representative period when possible; otherwise document the assumption and run a conservative scenario.
The calculator applies the entered values directly and does not add hidden benchmarks or technology-specific limits.
Change one input at a time to see which assumption has the greatest effect on the main result.
Use the result for planning, then validate it with monitoring, vendor limits, and a test under realistic load.
| Output | Planning use |
|---|---|
| Main estimate | Primary sizing result under the entered assumptions |
| Supporting metrics | Show demand, margin, rate, area, or equivalent usage |
| Interpretation | Explains whether the scenario meets its target or needs validation |